20275658317 has 2 divisors, whose sum is σ = 20275658318. Its totient is φ = 20275658316.

The previous prime is 20275658287. The next prime is 20275658321. The reversal of 20275658317 is 71385657202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15871212361 + 4404445956 = 125981^2 + 66366^2 .

It is a cyclic number.

It is not a de Polignac number, because 20275658317 - 2⁷ = 20275658189 is a prime.

It is a super-2 number, since 2×20275658317² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20275652317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10137829158 + 10137829159.

It is an arithmetic number, because the mean of its divisors is an integer number (10137829159).

Almost surely, 2^20275658317 is an apocalyptic number.

It is an amenable number.

20275658317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20275658317 is an equidigital number, since it uses as much as digits as its factorization.

20275658317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 20275658317 in words is "twenty billion, two hundred seventy-five million, six hundred fifty-eight thousand, three hundred seventeen".